Geekend readers who are fans of The Big Bang Theory might want to keep their eyes on Twitter during tomorrow's episode of the TV show, which airs on CBS at 8:00 PM ET/5:00 PM PT. As part of CBS Tweet Week, actor Simon Helberg, who plays Howard Wolowitz on The Big Bang Theory, will be tweeting during the broadcast and answering fans' questions. His Twitter account is @SimonHelberg, and when you submit questions, please use the hash tag #BigBangTheory.